The positive crankcase ventilation valve releases exhaust gas and unburned fuel from the engine block into the intake manifold. All engines allow some exhaust gases, unburned fuel and oil to ...

Heres what you need to know. The PCV (positive crankcase ventilation) valve is a one-way valve that recycles crankcase gases ...

“Blowby-liquid from the positive crankcase ventilation system may collect on the intake air hose. If this occurs, then this ...